Pre-heat oven to 350 and line a muffin tin with 12 liners. Set aside.
Whisk together the flour, baking soda, cinnamon, and salt together. Set aside.
In a large bowl mix together the sugar and vegetable oil.
Mix in the egg.
Mix in the milk, then the lemon juice and lastly the vanilla.
Stir in the zucchini.
Sift the dry ingredients over the wet ingredients and mix until just combined.
Fold in the chocolate chips and the walnuts.
Add evenly to the muffin tins and top with additional chocolate chips if you'd like.
Bake for 25 minutes or until they are browned and a tooth pick comes out clean from the center.
Cool in pan for 5 minutes before transferring them to a wire rack to cool, or enjoy warm.
Notes
Store at room temperature in an airtight container for up to 4 days, or in the fridge for up to 5.Freeze in freezer bags or airtight container once cooled completely for up to 3 months.